#import <Foundation/Foundation.h>
#import "sqlite3.h"
#import "ProvincePO.h"
#import "CityPO.h"
#import "ZonePO.h"
@interface Dao : NSObject{
    sqlite3 *db; //声明一个sqlite3数据库
}
-(NSMutableArray*)findProvinceList;
-(NSMutableArray*)findCityList:(NSString*)provinceId;
-(NSMutableArray*)findZoneList:(NSString*)cityId;
- (void)openDB;
@end
